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The Virgo automatic alignment system

F. Acernese P. Amico M. Al-Shourbagy S. Aoudia 1 S. Avino D. Babusci G. Ballardin R. Barillé F. Barone L. Barsotti M. Barsuglia 2 F. Beauville 3 M.A. Bizouard 2 C. Boccara 4 François Bondu 1 L. Bosi C. Bradaschia S. Braccini A. Brillet 1 V. Brisson 2 L. Brocco D. Buskulic 3 E. Calloni E. Campagna F. Cavalier 2 R. Cavalieri G. Cella E. Chassande-Mottin 1 C. Corda A.-C. Clapson 2 F. Cleva 1 J.-P. Coulon 1 E. Cuoco V. Dattilo M. Davier 2 R. de Rosa L. Di Fiore A. Di Virgilio B. Dujardin 1 A. Eleuteri D. Enard I. Ferrante F. Fidecaro I. Fiori R. Flaminio 3 J.-D. Fournier 1 S. Frasca F. Frasconi A. Freise L. Gammaitoni A. Gennai A. Giazotto G. Giordano L. Giordano R. Gouaty 3 D. Grosjean 3 G. Guidi S. Hebri H. Heitmann 1 P. Hello 2 L. Holloway S. Kreckelbergh 2 P. La Penna V. Loriette 4 M. Loupias G. Losurdo J.-M. Mackowski 5 E. Majorana C.N. Man 1 M. Mantovani F. Marchesoni F. Marion 3 J. Marque F. Martelli A. Masserot 3 M. Mazzoni L. Milano C. Moins Julien Moreau 6 N. Morgado 5 B. Mours 3 A. Pai C. Palomba F. Paoletti S. Pardi A. Pasqualetti R. Passaquieti D. Passuello B. Perniola F. Piergiovanni L. Pinard 5 R. Poggiani M. Punturo P. Puppo K. Qipiani P. Rapagnani V. Reita 4 A. Remillieux 5 F. Ricci I. Ricciardi P. Ruggi G. Russo S. Solimeno Alessandro D.A.M. Spallicci 1 R. Stanga R. Taddei D. Tombolato M. Tonelli A. Toncelli E. Tournefier 3 F. Travasso G. Vajente D. Verkindt 3 F. Vetrano A. Viceré J.-Y. Vinet 1 H. Vocca M. Yvert 3 Z. Zhang
Abstract : The automatic alignment system of the Virgo interferometer differs substantially from those used in similar experiments, since it uses a variant of the Anderson technique. This implies a completely different control topology with respect to other detectors, and the main feature is a strong coupling of different degrees of freedom in the optical signals. It also provides two extra output ports in which differential wave-front sensors can be placed, namely the light transmitted by the Fabry–Perot arm cavities. We report on the first experimental demonstration of this technique on a large scale recycled interferometer, and on the present status of the automatic alignment system.
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Submitted on : Thursday, May 4, 2006 - 2:06:02 PM
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F. Acernese, P. Amico, M. Al-Shourbagy, S. Aoudia, S. Avino, et al.. The Virgo automatic alignment system. 6th Edoardo Amaldi Conference on Gravitational Waves, Jun 2005, Okinawa, Japan. pp.S91-S101, ⟨10.1088/0264-9381/23/8/S13⟩. ⟨in2p3-00026007⟩



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